A tool window for sketch Offset, with a typed Distance, Flip and Chain (#731)

Sketch Offset gets its own tool window with a typed Distance, Flip and Chain, as a variant of the sketch modify window.

crates/ui-egui/src/locales/ja.json

@@ -46,6 +46,7 @@
   "ui.cancel": "キャンセル",
   "ui.canvases": "キャンバス",
   "ui.centerline": "中心線",
+  "ui.chain": "チェーン",
   "ui.chamfer": "面取り",
   "ui.change_workspace": "ワークスペースの変更",
   "ui.chord_length": "弦長",
@@ -74,6 +75,7 @@
   "ui.create_sketch": "スケッチを作成",
   "ui.current": "現在",
   "ui.curvature": "曲率",
+  "ui.curves": "曲線",
   "ui.cut": "切り取り",
   "ui.cylinder": "円柱",
   "ui.dark": "ダーク",
@@ -143,6 +145,7 @@
   "ui.heading_mirror": "ミラー",
   "ui.heading_modify": "修正",
   "ui.heading_move": "移動",
+  "ui.heading_offset": "オフセット",
   "ui.heading_offset_plane": "オフセット平面",
   "ui.heading_ok": "OK",
   "ui.heading_parameters": "パラメータ",